X-ray fluoroscopic imaging system

Abstract

The present invention may perform fluoroscopic imaging simultaneously on the subjects in at least two channels using only one electron accelerator, at least two sets of X-ray beams and at least two sets of detector systems, through the design of the electron accelerator, the shielding and collimating device, the at least two detector arrays and various mechanical composite structures. The X-ray fluoroscopic imaging system according to the present invention may be designed in specific forms of a stationary type, an assembled type, a track mobile type or vehicular mobile type, etc., and has advantages such as simple structure, low cost, strong function, good image quality and the like.

Description

[0001]This application claims priority to Chinese Patent Application No. 201310741677.6, filed with the Chinese Patent Office on Dec. 30, 2013, which is incorporated herein by reference in its entirety.FIELD OF THE INVENTION[0002]The present invention relates to a system for performing fluoroscopic imaging with high-energy X-ray generated by a high-energy electron accelerator in nondestructive inspection, fluoroscopic imaging, and a security inspection apparatus for large container inspection, vehicle inspection, air freight inspection, train inspection and the like, and in particularly, to a system for performing fluoroscopic imaging simultaneously on subjects in at least two channels by using a high-energy X-ray source.BACKGROUND OF THE INVENTION[0003]X-ray is widely applicable in the field of industrial nondestructive detection, security inspection and the like. For a large-sized subject to be detected, such as a boiler, a airspace engine, a bulk cargo at the airport / railway / cust...

AI Technical Summary

Benefits of technology

[0014]The present invention simultaneously performs fluoroscopic imaging on the subjects in at least two inspection channels using only one electron accelerator, at least two sets of X-ray beams and at least two sets of detector systems, through the design of the electron accelerator, the shielding and collimating device, the at least two detector arrays and various mechanical composite structures, and has advantages as follows: the at least two channels are inspected simultaneously, and the speed is fast; only one electron accelerator is used, the structure is simple and the cost is low; instead of Cobalt-60, the electron accelerator is used as the ray source, and the security reliability is higher; more sets of X-ray beams may be extracted through the design of the collimators, and a dual-view-angle function may be realized to enable the hierarchical visibility of the fluoroscopic image; X-ray beams with different energy may be extracted, to realize the material recognition of the subjects; and a dual-channel / dual-energy / dual-view-angle high-energy X-ray fluoroscopic imaging system with integrated multifunction may be realized. Furthermore, the X-ray beam in the present invention has a number of advantages in the planar fan-shaped region thereof, such as small energy spread, uniform intensity distribution, small target point, and being able to be extracted at a large angle, etc. The image quality of the X-ray fluoroscopic imaging system can be improved. The X-ray fluoroscopic imaging system according to the present invention can be designed in specific forms of a stationary type, a assembled type, a track mobile type or vehicular mobile type, etc., and has advantages such as simple structure, low cost, strong function, good image quality and the like.

Problems solved by technology

With respect to the inspection system for large-sized cargoes using Cobalt-60, on one hand, the energy of rays is low, the penetration energy is limited, and the volume of the subject that can be checked is limited; on the other hand, Cobalt-60 has a inherent half-time period of 5.27 years, and thus the ray source has to be replaced after a period of time, otherwise the image quality will degrade due to the weakening of ray intensity.

The inspection system for large-sized cargoes using Cobalt-60 has many problems in safety management due to the inherent radioactivity of Cobalt-60, unlike the electron accelerator system, in which X-ray is generated only when power is on and the beam is produced, and which is safe when the beam is stopped or power is off.

Generally only one X-ray beam is extracted for the system with only one inspection channel, and thus the inspection speed is slow and the efficiency is low.

The Cobalt-60 γ-ray source has its particularity in using and processing, such as a shutter device and the like, and has shortages such as low energy, limited penetration capability; short inherent decay, short life, which requires periodic replacement; long-term radiation, large difficulty in safety management, etc.

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